node/tools/eslint/node_modules/es5-ext/array/#/copy-within/is-implemented.js

'use strict';

module.exports = function () {
	var arr = [1, 2, 3, 4, 5];
	if (typeof arr.copyWithin !== 'function') return false;
	return String(arr.copyWithin(1, 3)) === '1,4,5,4,5';
};